I would like to see the footprint for the breeding tree decreased from 6x6 to 5x5. It just doesn't need to be that large.
I would also like to see the crystals decreased from 2x2 to 1x1. I'm sure there are other unnecessarily large buildings there, maybe the colisseum?
Some of the islands have irregular edges of available space that prevent placement of habitats. And a few of the islands are just 1 row short of being able to place another set of habitats in place. These are a bit frustrating for me, that extra row could mean 2 or 3 more habitats on the island.
I know the islands had adjustments last year sometime, perhaps it can be done again, considering the number of dragons being constantly added? Food for thought!

Some building needs to be removed like the combat building, dragon market,etc.

@susan-mclaughlin Yeah, the breeding tree has no business being as big as it is, especially with all the empty space in the area it takes up. The extra space is needed on the Ivory island, as there’s no way to arrange habitats symmetrically on it!